Mapping of Smn to Chromosome 13. (A) Haplotypes from the Jackson Laboratory BSS backcross panel showing part of Chromosome 13 with loci linked to Smn. Loci are listed in order with the most proximal at the top. (▪) The C57BL/6JEi allele; (□) the SPRET/Ei allele. The number of animals with each haplotype is given at the bottom of each column of boxes. The estimated percent recombination (R) between adjacent loci is given at right, with the standard error (SE) of the estimate. Missing typing for markersD13Bir17, D13Mit105, Dhfr,D13Mit145, and D13Bir19 was inferred from the genotypes of the flanking loci where assignment was unambiguous. The Mouse Genome Database (MGD) accession number for genetic mapping ofSmn is MGD-CREX-705. (B) Map showing part of Chromosome 13 from The Jackson BSS backcross panel. The map is depicted with the centromere toward the top. A 3-cM scale bar is shown at right. Loci mapping to the same position are listed in alphabetical order. These data can be obtained from The Jackson Laboratory on World Wide Web sitehttp://www.jax.org/resources/documents/cmdata.
